/Engine/Source/Editor/GraphEditor/Public/SGraphActionMenu.h
Get category child actions for the passed in action
void GetCategorySubActions ( [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [FGraphActionNode](API\Editor\GraphEditor\FGraphActionNode) > InAction, [TArray](API\Runtime\Core\Containers\TArray)< [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FEdGraphSchemaAction](API\Runtime\Engine\EdGraph\FEdGraphSchemaAction) >> & OutActions ) const